:root {
    /* iOS Color Palette */
    --color-primary: #007AFF;
    --color-primary-dark: #0051D5;
    --color-background: #F2F2F7;
    --color-surface: #FFFFFF;
    --color-border: #C6C6C8;
    --color-separator: #E5E5EA;

    --color-text-primary: #000000;
    --color-text-secondary: #8E8E93;
    --color-text-tertiary: #C7C7CC;

    --color-success: #34C759;
    --color-error: #FF3B30;
    --color-warning: #FF9500;

    /* Spacing */
    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 12px;
    --spacing-lg: 16px;
    --spacing-xl: 20px;
    --spacing-2xl: 24px;
    --spacing-3xl: 32px;

    /* Border Radius */
    --radius-sm: 8px;
    --radius-md: 10px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    --radius-pill: 100px;

    /* Typography */
    --font-family: -apple-system, BlinkMacSystemFont, 'SF Pro Display', 'Inter', sans-serif;
    --font-size-xs: 12px;
    --font-size-sm: 14px;
    --font-size-base: 16px;
    --font-size-lg: 18px;
    --font-size-xl: 20px;
    --font-size-2xl: 24px;
    --font-size-3xl: 32px;

    /* Shadows */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.04);
    --shadow-md: 0 2px 8px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 4px 16px rgba(0, 0, 0, 0.12);

    /* Safe areas for iOS */
    --safe-area-top: env(safe-area-inset-top);
    --safe-area-bottom: env(safe-area-inset-bottom);
    --bottom-nav-height: 80px;
}

/* Reset */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    -webkit-tap-highlight-color: transparent;
}

html {
    font-size: 16px;
    height: 100%;
}

body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    line-height: 1.5;
    color: var(--color-text-primary);
    background: var(--color-background);
    height: 100%;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* App Container */
.app-container {
    min-height: 100vh;
    padding-bottom: calc(var(--bottom-nav-height) + var(--safe-area-bottom));
}

/* Pages */
.page {
    display: none;
    min-height: 100vh;
}

.page.active {
    display: block;
}

.page-header {
    background: var(--color-surface);
    padding: var(--spacing-2xl) var(--spacing-lg);
    padding-top: calc(var(--spacing-2xl) + var(--safe-area-top));
    border-bottom: 0.5px solid var(--color-separator);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--spacing-md);
}

.page-title {
    font-size: var(--font-size-3xl);
    font-weight: 700;
    letter-spacing: -0.5px;
    flex: 1;
}

/* Header Buttons */
.header-btn,
.header-back {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-primary);
    color: white;
    border: none;
    border-radius: 50%;
    cursor: pointer;
    transition: all 0.2s;
    text-decoration: none;
    flex-shrink: 0;
}

.header-btn:active,
.header-back:active {
    transform: scale(0.9);
}

.header-back {
    background: var(--color-separator);
    color: var(--color-primary);
}

.header-spacer {
    width: 36px;
    height: 36px;
    flex-shrink: 0;
}

/* Modal */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 1000;
    display: flex;
    align-items: flex-end;
    justify-content: center;
}

.modal.hidden {
    display: none;
}

.modal-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.4);
    backdrop-filter: blur(4px);
}

.modal-content {
    position: relative;
    background: var(--color-surface);
    border-radius: var(--radius-xl) var(--radius-xl) 0 0;
    padding: var(--spacing-xl);
    padding-bottom: calc(var(--spacing-xl) + var(--safe-area-bottom));
    max-height: 80vh;
    overflow-y: auto;
    width: 100%;
    max-width: 600px;
    animation: slideUp 0.3s ease-out;
}

@keyframes slideUp {
    from {
        transform: translateY(100%);
    }

    to {
        transform: translateY(0);
    }
}

.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--spacing-lg);
}

.modal-title {
    font-size: var(--font-size-xl);
    font-weight: 700;
}

.modal-close {
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-separator);
    color: var(--color-text-primary);
    border: none;
    border-radius: 50%;
    cursor: pointer;
    transition: all 0.2s;
}

.modal-close:active {
    transform: scale(0.9);
}

.page-content {
    padding: var(--spacing-lg);
}

/* Stats Cards */
.stats-cards {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-2xl);
}

.stat-card {
    background: var(--color-surface);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    text-align: center;
}

.stat-value {
    font-size: var(--font-size-3xl);
    font-weight: 700;
    color: var(--color-primary);
    margin-bottom: var(--spacing-xs);
}

.stat-label {
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
}

/* Action Buttons */
.action-buttons {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

/* Buttons */
.btn-primary,
.btn-secondary {
    width: 100%;
    padding: var(--spacing-lg);
    font-size: var(--font-size-base);
    font-weight: 600;
    font-family: var(--font-family);
    border-radius: var(--radius-md);
    border: none;
    cursor: pointer;
    transition: all 0.2s;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
}

.btn-primary {
    background: var(--color-primary);
    color: white;
}

.btn-primary:active {
    background: var(--color-primary-dark);
    transform: scale(0.98);
}

.btn-primary:disabled {
    opacity: 0.3;
    cursor: not-allowed;
}

.btn-secondary {
    background: var(--color-surface);
    color: var(--color-primary);
    border: 1px solid var(--color-border);
}

.btn-secondary:active {
    background: var(--color-separator);
}

.btn-small {
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: var(--font-size-sm);
}

.btn-danger {
    background: var(--color-error);
    color: white;
}

/* Camera Section */
.camera-section {
    margin-bottom: var(--spacing-2xl);
}

.camera-container {
    position: relative;
    width: 100%;
    aspect-ratio: 1;
    background: var(--color-surface);
    border-radius: var(--radius-lg);
    overflow: hidden;
    margin-bottom: var(--spacing-lg);
}

.camera-preview,
.camera-canvas,
.photo-preview {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.photo-preview img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.camera-controls {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.hidden {
    display: none !important;
}

/* Forms */
.form {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.form-label {
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: var(--color-text-primary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.form-input {
    width: 100%;
    padding: var(--spacing-md) var(--spacing-lg);
    font-size: var(--font-size-base);
    font-family: var(--font-family);
    background: var(--color-surface);
    border: 1px solid var(--color-separator);
    border-radius: var(--radius-md);
    color: var(--color-text-primary);
    transition: border-color 0.2s;
}

.form-input:focus {
    outline: none;
    border-color: var(--color-primary);
}

select.form-input {
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg width='12' height='8' viewBox='0 0 12 8' fill='none' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M1 1.5L6 6.5L11 1.5' stroke='%238E8E93' stroke-width='2' stroke-linecap='round'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 16px center;
    padding-right: 40px;
}

/* Alert */
.alert {
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    margin-top: var(--spacing-lg);
    font-size: var(--font-size-sm);
}

.alert.success {
    background: rgba(52, 199, 89, 0.1);
    color: var(--color-success);
}

.alert.error {
    background: rgba(255, 59, 48, 0.1);
    color: var(--color-error);
}

/* Filter Pills */
.filter-pills {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-xl);
}

.pill {
    padding: var(--spacing-sm) var(--spacing-lg);
    background: var(--color-surface);
    border: 1px solid var(--color-separator);
    border-radius: var(--radius-pill);
    color: var(--color-text-primary);
    font-size: var(--font-size-sm);
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
}

.pill:active {
    transform: scale(0.95);
}

.pill.active {
    background: var(--color-primary);
    color: white;
    border-color: var(--color-primary);
}

/* Items Grid */
.items-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-md);
}

.item-card {
    background: var(--color-surface);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
}

.item-image {
    width: 100%;
    aspect-ratio: 1;
    object-fit: cover;
    background: var(--color-separator);
}

.item-info {
    padding: var(--spacing-md);
}

.item-category {
    font-size: var(--font-size-xs);
    color: var(--color-text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: var(--spacing-xs);
}

.item-name {
    font-weight: 600;
    color: var(--color-text-primary);
    margin-bottom: var(--spacing-sm);
}

.item-actions {
    display: flex;
    gap: var(--spacing-xs);
}

/* Outfit Builder */
.outfit-builder {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
}

.category-selector {
    background: var(--color-surface);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
}

.category-selector-title {
    font-size: var(--font-size-sm);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-md);
}

.category-items {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-sm);
}

.outfit-item {
    aspect-ratio: 1;
    border-radius: var(--radius-md);
    overflow: hidden;
    cursor: pointer;
    border: 2px solid transparent;
    transition: all 0.2s;
}

.outfit-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.outfit-item:active {
    transform: scale(0.95);
}

.outfit-item.selected {
    border-color: var(--color-primary);
}

/* Outfits Gallery */
.outfits-gallery {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.outfit-card {
    background: var(--color-surface);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
}

.outfit-preview {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1px;
    background: var(--color-separator);
}

.outfit-preview img {
    width: 100%;
    aspect-ratio: 1;
    object-fit: cover;
}

.outfit-card-info {
    padding: var(--spacing-lg);
}

.outfit-card-name {
    font-weight: 600;
    font-size: var(--font-size-lg);
    margin-bottom: var(--spacing-xs);
}

.outfit-card-meta {
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-md);
}

.outfit-card-actions {
    display: flex;
    gap: var(--spacing-sm);
}

/* Loading & Empty States */
.loading,
.empty-state {
    text-align: center;
    padding: var(--spacing-3xl) var(--spacing-lg);
    color: var(--color-text-secondary);
}

.empty-state-icon {
    font-size: 48px;
    margin-bottom: var(--spacing-md);
}

.empty-state-text {
    font-size: var(--font-size-base);
    margin-bottom: var(--spacing-sm);
}

/* Bottom Navigation */
.bottom-nav {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    height: var(--bottom-nav-height);
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-top: 0.5px solid var(--color-separator);
    display: flex;
    justify-content: space-around;
    align-items: center;
    padding-bottom: var(--safe-area-bottom);
    z-index: 100;
}

.nav-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
    padding: var(--spacing-sm);
    color: var(--color-text-secondary);
    text-decoration: none;
    transition: color 0.2s;
    flex: 1;
}

.nav-item svg {
    width: 24px;
    height: 24px;
}

.nav-item span {
    font-size: var(--font-size-xs);
    font-weight: 500;
}

.nav-item.active {
    color: var(--color-primary);
}

.nav-item:active {
    opacity: 0.6;
}

/* Responsive Adjustments */
@media (min-width: 768px) {
    .app-container {
        max-width: 768px;
        margin: 0 auto;
    }

    .items-grid {
        grid-template-columns: repeat(3, 1fr);
    }

    .category-items {
        grid-template-columns: repeat(5, 1fr);
    }
}

@media (min-width: 1024px) {
    .items-grid {
        grid-template-columns: repeat(4, 1fr);
    }
}